End Game Slaughter Moves

[Zeldor]

That's surely a cheat and there is practically nothing you can about it. You should mention that in the game thread and talk with game host. If player repeats that he should be banned from that game. IF host think it is valid move then you know which games to avoid [and you know that host just found a new tactic he will also use next time, probably even build his nation strategy next time].